U.S. patent number 11,204,660 [Application Number 16/887,529] was granted by the patent office on 2021-12-21 for touch sensor and display device including the same.
This patent grant is currently assigned to SAMSUNG DISPLAY CO., LTD.. The grantee listed for this patent is SAMSUNG DISPLAY CO., LTD.. Invention is credited to Sung Ho Cho, Hyun Sik Park, Sung Jin Yang, Chun Gi You.
United States Patent |
11,204,660 |
Yang , et al. |
December 21, 2021 |
Touch sensor and display device including the same
Abstract
A display device includes a first substrate, light emitting
elements, a second substrate, and a touch sensor on the second
substrate. The touch sensor includes a first touch conductive layer
on the second substrate, a touch insulating layer on the first
touch conductive layer, and a second touch conductive layer on the
touch insulating layer. The first touch conductive layer includes
first sub-sensing electrodes, a connecting portion connecting the
first sub-sensing electrodes adjacent to each other, and second
sub-sensing electrodes. The second touch conductive layer includes
a third sub-sensing electrode connected to one of the first
sub-sensing electrodes through contact holes passing through the
touch insulating layer, and a fourth sub-sensing electrode
electrically connected to one of the second sub-sensing electrodes
through contact holes passing through the touch insulating layer
electrically connecting the second sub-sensing electrodes adjacent
to each other.
Inventors: |
Yang; Sung Jin (Cheonan-si,
KR), Park; Hyun Sik (Cheonan-si, KR), You;
Chun Gi (Asan-si, KR), Cho; Sung Ho (Yongin-si,
KR) |
Applicant: |
Name |
City |
State |
Country |
Type |
SAMSUNG DISPLAY CO., LTD. |
Yongin-si |
N/A |
KR |
|
|
Assignee: |
SAMSUNG DISPLAY CO., LTD.
(Yongin-si, KR)
|
Family
ID: |
1000006007445 |
Appl.
No.: |
16/887,529 |
Filed: |
May 29, 2020 |
Prior Publication Data
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|
|
Document
Identifier |
Publication Date |
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US 20210141477 A1 |
May 13, 2021 |
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Foreign Application Priority Data
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Nov 12, 2019 [KR] |
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10-2019-0144123 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
G06F
3/0445 (20190501); G06F 3/0412 (20130101); G06F
3/047 (20130101); G06F 2203/04112 (20130101) |
Current International
Class: |
G06F
3/041 (20060101); G06F 3/044 (20060101); G06F
3/047 (20060101) |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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20110025374 |
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Mar 2011 |
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KR |
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20170089467 |
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Aug 2017 |
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KR |
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20180025023 |
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Mar 2018 |
|
KR |
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20180058284 |
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Jun 2018 |
|
KR |
|
Primary Examiner: Patel; Nitin
Assistant Examiner: Bogale; Amen W.
Attorney, Agent or Firm: F. Chau & Associates, LLC
Claims
What is claimed is:
1. A display device, comprising: a first substrate; a plurality of
light emitting elements disposed on the first substrate; a second
substrate disposed opposite the first substrate; and a touch sensor
disposed on the second substrate, wherein the touch sensor includes
a first touch conductive layer which is disposed on the second
substrate and includes a first transparent conductive material and
a first dummy electrode, a touch insulating layer disposed on the
first touch conductive layer, and a second touch conductive layer
which is disposed on the touch insulating layer and includes a
second transparent conductive material, wherein the first touch
conductive layer includes a plurality of first sub-sensing
electrodes arranged in a first direction, a connecting portion
connecting the first sub-sensing electrodes adjacent to each other,
and a plurality of second sub-sensing electrodes which are arranged
in a second direction crossing the first direction and are spaced
apart from the first sub-sensing electrodes and the connecting
portion, and wherein the second touch conductive layer includes a
third sub-sensing electrode electrically connected to one of the
first sub-sensing electrodes through a plurality of first contact
holes passing through the touch insulating layer, and a fourth
sub-sensing electrode which is electrically connected to one of the
second sub-sensing electrodes through a plurality of second contact
holes passing through the touch insulating layer so as to
electrically connect the second sub-sensing electrodes adjacent to
each other and is spaced apart from the third sub-sensing
electrode, wherein the limrth sub-sensing electrode at least
partially overlaps the first dummy electrode.
2. The display device of claim 1, wherein the third sub-sensing
electrode at least partially overlaps the first sub-sensing
electrode, and the fourth sub-sensing electrode at least partially
overlaps the second sub-sensing electrode.
3. The display device of claim 2, wherein the fourth sub-sensing
electrode extends primarily in the second direction, at least
partially overlaps the connecting portion in a thickness direction,
and is electrically insulated from the connecting portion.
4. The display device of claim 3, wherein: the first dummy
electrode is disposed between the first sub-sensing electrode and
the second sub-sensing electrode which are adjacent to each other;
and the first dummy electrode is a floating electrode which is
spaced apart from the first sub-sensing electrode adjacent thereto
with a space therebetween and spaced apart from the second
sub-sensing electrode adjacent thereto with a space
therebetween.
5. The display device of claim 4, wherein: the fourth sub-sensing
electrode at least partially covers the separation space between
the first dummy electrode and the second sub-sensing electrode; and
the third sub-sensing electrode at least partially covers the space
between the first dummy electrode and the first sub-sensing
electrode and of at least partially overlaps the first dummy
electrode.
6. The display device of claim 4, wherein: the second touch
conductive layer further includes a second dummy electrode disposed
between the third sub-sensing electrode and the fourth sub-sensing
electrode which are adjacent to each other: and the second dummy
electrode is spaced apart from the third sub-sensing electrode
adjacent thereto with a space therebetween and spaced apart from
the fourth sub-sensing electrode adjacent thereto with a space
therebetween.
7. The display device of claim 3, wherein: the touch sensor further
includes a third touch conductive layer disposed between the first
touch conductive layer and the touch insulating layer; and the
third touch conductive layer includes an opaque conductive
material.
8. The display device of claim 7, wherein: the touch sensor further
includes a plurality of touch wires connected to the plurality of
first sub-sensing electrodes or the plurality of second sub-sensing
electrodes; the plurality of touch wires includes a first wire
portion and a second wire portion disposed on the first wire
portion; the first touch conductive layer further includes the
first wire portion; and the third touch conductive layer further
includes the second wire portion.
9. The display device of claim 8, wherein the second wire portion
is disposed directly o the first wire portion and is electrically
connected to the first wire portion.
10. The display device of claim 8, wherein the touch sensor further
includes a cap pattern covering the plurality of touch wires, and
the second touch conductive layer further includes the cap
pattern.
11. The display device of claim 3, wherein the first transparent
conductive material and the second transparent conductive material
each include amorphous indium tin oxide.
12. The display device of claim 3, wherein the first substrate
includes a display substrate, the second substrate includes an
encapsulation substrate sealing the plurality of light emitting
elements, and the touch sensor is disposed directly on the
encapsulation substrate.
13. The display device of claim 3, wherein each sub-sensing
electrode of the first sub-sensing electrodes, the second
sub-sensing electrodes, the third sub-sensing electrode, and the
fourth sub-sensing electrodes have a planar shape.
14. The display device of claim 3, further comprising a polarizing
film disposed on the touch sensor and an adhering member disposed
between the polarizing film and the touch sensor, wherein the
adhering member directly contacts the second touch conductive
layer.
15. The display device of claim 3, wherein planar profiles of third
sub-sensing electrode and the first sub-sensing electrode, which
overlaps the third sub-sensing electrode in the thickness
direction, are the same; and planar profiles of the fourth
sub-sensing electrode and the second sub-sensing electrode, which
overlaps the fourth sub-sensine electrode in the thickness
direction, are the same.
16. A display device, comprising: a first substrate; a plurality of
light emittingelements disposed on the first substrate; a second
substrate disposed opposite the first substrate; and a touch sensor
disposed on the second substrate, wherein the touch sensor includes
a first touch conductive layer which is disposed on the second
substrate and includes a first transparent conductive material, a
touch insulating layer disposed on the first touch conductive
layer, and a second touch conductive layer which is disposed on the
touch insulating layer and includes a second transparent conductive
material. wherein the first touch conductive layer includes a
plurality of first sub-sensim electrodes arranged in a first
direction, a connecting portion connecting the first sub-sensing
electrodes adjacent to each other, and a plurality of second
sub-sensing electrodes which are arranged in a second direction
crossing the first direction and are spaced apart from the first
sub-sensing electrodes and, the connecting ting portion, wherein
the second touch conductive layer includes a third sub-sensing
electrode electrically connected to one of the first sub-sensing
electrodes through a plurality of first contact holes passing
through the touch insulating layer, and a fourth sub-sensing
electrode which is electrically connected to one of the second
sub-sensing electrodes through a plurality of second contact holes
passing through the touch insulating layer so as to electrically
connect the second sub-sensing electrodes adjacent to each other
and is spaced apart from the third sub-sensing electrode, wherein
the third sub-sensing electrode at least partially overlaps the
first sub-sensing electrode, and the fourth sub -sensing electrode
at least partially overlaps the second sub-sensing electrode,
wherein the first touch conductive layer further includes a first
dummy electrode disposed between the first sub-sensing electrode
and the second sub-sensing electrode which are adjacent to each
other, wherein the first dummy electrode is a floating electrode
which is spaced apart from the first sub-sensing electrode adjacent
thereto with a space therebetween and spaced apart from the second
sub-sensing electrode adjacent thereto with a space therebetween,
wherein the second touch conductive layer further includes a second
dummy electrode disposed between the third sub-sensing electrode
and the fourth sub sensing electrode which are adjacent to each
other, wherein the second dummy electrode is spaced apart from the
third sub-sensing electrode adjacent thereto with a space
therebetween and spaced apart from the fourth sub-sensing electrode
adjacent thereto with a space therebetween, and wherein a width of
the second dummy electrode is larger than a width of the first
dummy electrode, and the second dummy electrode at least partially
covers the space between the first dummy electrode and the second
sub-sensing electrode and the space between the first dummy
electrode and the first sub-sensing electrode.
17. The display device of claim 16, wherein the second dummy
electrode includes a plurality of dummy patterns separated from
each other, and the first dummy electrode covers a space between
the dummy patterns that are adjacent to each other.
18. A touch sensor, comprising: a first touch conductive layer
including a first transparent conductive material; a touch
insulating layer disposed on the first touch conductive layer; and
a second touch conductive layer disposed on the touch insulating
layer and including a second transparent conductive material,
wherein the first touch conductive layer includes a plurality of
first sub-sensing electrodes arranged in a first direction, a
connecting portion configured to connect the first sub-sensing
electrodes adjacent to each other, a plurality of second
sub-sensing electrodes which are arranged in a second direction
crossing the first direction and are spaced apart from the first
sub-sensing electrodes and the connecting portion, and a first
dummy electrode, wherein the second touch conductive layer includes
a third sub-sensing electrode electrically connected to one of the
first sub-sensing electrodes through a plurality of first contact
holes passing, through the touch insulating layer, and a fourth
sub-sensing electrode which is electrically connected to one of the
second sub-sensing electrodes through a plurality of second contact
holes passing through the touch insulating layer electrically
connecting the second sub-sensing electrodes adjacent to each
other, and is spaced apart from the third sub-sensing electrode,
wherein the fourth sub-sensing electrode at least partially
overlaps the first dummy electrode.
19. The touch sensor of claim 18, wherein: the third sub-sensing
electrode at least partially overlaps the first sub-sensing
electrode; the tburth sub-sensing electrode at least partially
overlaps the second sub-sensing electrode; the fourth sub-sensing
electrode extends primarily in the second direction; and the fourth
sub-sensing electrode at least partially overlaps the connecting
portion in a thickness direction and is electrically insulated from
the connecting portion.
20. The touch sensor of claim 18, further comprising a third touch
conductive layer disposed between the first touch conductive layer
and the touch insulating layer, wherein: the third touch conductive
layer includes an opaque conductive material; the touch sensor
further includes a plurality of touch wires connected to the
plurality of first sub-sensing electrode or the plurality of second
sub-sensing electrode; and the plurality of touch wires includes a
first wire portion and a second wire portion disposed on the first
wire portion, the first touch conductive layer further includes the
first wire portion, and the third touch conductive layer further
includes the second wire portion.
Description
This application claims priority under 35 U.S.C. .sctn. 119 to
Korean Patent Application No. 10-2019-0144123, filed on Nov. 12,
2019 in the Korean Intellectual Property Office, the disclosure of
which is incorporated by reference herein in its entirety.
TECHNICAL FIELD
The present disclosure relates to a display and, more specifically,
to a touch sensor and a display device including the same.
DISCUSSION OF THE RELATED ART
Modern display devices may come in a wide variety of shapes and
sizes and are often integrated with touch sensors so as to form
touchscreens. While previously the use of touchscreens was limited
to small portable devices, such as smartphones, today's
touchscreens are used in various other devices such as personal
computers where the use of touch screens may replace more
conventional input devices such as physical keyboards.
A touch sensor, such as that of a touchscreen display device,
includes a plurality of electrode portions disposed in a sensing
area for sensing a touch input. When the resistance of the
electrode portions is high, not only will the power consumption of
the display device itself including the touch sensor increase, but
also a resistive-capacity (RC) delay may occur within the touch
sensor.
SUMMARY
An exemplary embodiment of the present disclosure provides a
display device in which the resistance of electrode portions of a
touch sensor is lowered.
An exemplary embodiment of the present disclosure provides a touch
sensor in which the resistance of electrode portions is
lowered.
According to an exemplary embodiment of the present disclosure, a
display device includes a first substrate. A plurality of light
emitting elements is disposed on the first substrate. A second
substrate is disposed opposite the first substrate. A touch sensor
is disposed on the second substrate. The touch sensor includes a
first touch conductive layer which is disposed on the second
substrate and includes a first transparent conductive material, a
touch insulating layer disposed on the first touch conductive
layer, and a second touch conductive layer which is disposed on the
touch insulating layer and includes a second transparent conductive
material. The first touch conductive layer includes a plurality of
first sub-sensing electrodes arranged in a first direction. A
connecting portion is configured to connect the first sub-sensing
electrodes adjacent to each other. A plurality of second
sub-sensing electrodes which are arranged in a second direction
crossing the first direction are spaced apart from the first
sub-sensing electrodes and the connecting portion. The second touch
conductive layer includes a third sub-sensing electrode
electrically connected to one of the first sub-sensing electrodes
through a plurality of first contact holes passing through the
touch insulating layer. A fourth sub-sensing electrode is
electrically connected to one of the second sub-sensing electrodes
through a plurality of second contact holes passing through the
touch insulating layer so as to electrically connect the second
sub-sensing electrodes adjacent to each other. The fourth
sub-sensing electrode is spaced apart from the third sub-sensing
electrode.
The third sub-sensing electrode may at least partially overlap the
first sub-sensing electrode. The fourth sub-sensing electrode may
at least partially overlap the second sub-sensing electrode.
The fourth sub-sensing electrode may extend primarily in the second
direction, may at least partially overlap the connecting portion in
a thickness direction, and may be electrically insulated from the
connecting portion.
The first touch conductive layer may further include a first dummy
electrode disposed between the first sub-sensing electrode and the
second sub-sensing electrode which are adjacent to each other. The
first dummy electrode may be a floating electrode which is spaced
apart from the first sub-sensing electrode adjacent thereto with a
separation space disposed therebetween and spaced apart from the
second sub-sensing electrode adjacent thereto with a separation
space disposed therebetween.
The fourth sub-sensing electrode may at least partially cover the
separation space between the first dummy electrode and the second
sub-sensing electrode and a portion of the first dummy electrode in
a plan view. The third sub-sensing electrode may at least partially
cover the separation space between the first dummy electrode and
the first sub-sensing electrode and another portion of the first
dummy electrode in the plan view.
The second touch conductive layer may further include a second
dummy electrode disposed between the third sub-sensing electrode
and the fourth sub-sensing electrode which are adjacent to each
other. The second dummy electrode may be spaced apart from the
third sub-sensing electrode adjacent thereto with a separation
space disposed therebetween and spaced apart from the fourth
sub-sensing electrode adjacent thereto with a separation space
disposed therebetween.
A width of the second dummy electrode may be larger than a width of
the first dummy electrode. The second dummy electrode may at least
partially cover the separation space between the first dummy
electrode and the second sub-sensing electrode and the separation
space between the first dummy electrode and the first sub-sensing
electrode.
The second dummy electrode may include a plurality of dummy
patterns separated from each other. The first dummy electrode may
at least partially cover a separation space between the dummy
patterns adjacent to each other.
The touch sensor may further include a third touch conductive layer
disposed between the first touch conductive layer and the touch
insulating layer.
The third touch conductive layer may include an opaque conductive
material.
The touch sensor may further include a plurality of touch wires
connected to the plurality of first sub-sensing electrodes or the
plurality of second sub-sensing electrodes.
The touch wire may include a first wire portion and a second wire
portion disposed on the first wire portion. The first touch
conductive layer may further include the first wiring portion. The
third touch conductive layer may further include the second wiring
portion.
The second wiring portion may be disposed directly on the first
wiring portion and may be electrically connected to the first
wiring portion.
The touch sensor may further include a cap pattern covering the
plurality of touch wires. The second touch conductive layer may
further include the cap pattern.
The first transparent conductive material and the second
transparent conductive material may each be formed including
amorphous indium tin oxide.
The first substrate may include a display substrate. The second
substrate may include an encapsulation substrate sealing the
plurality of light emitting elements. The touch sensor may be
disposed directly on the encapsulation substrate.
The sensing electrodes of the touch sensor each have a planar
shape.
The display device may further include a polarizing film disposed
on the touch sensor and an adhering member disposed between the
polarizing film and the touch sensor. The adhering member may come
into direct contact with the second touch conductive layer.
Planar profiles of the third sub-sensing electrode and the first
sub-sensing electrode, which overlaps the third sub-sensing
electrode in the thickness direction, may be the same as each
other. Planar profiles of the fourth sub-sensing electrode and the
second sub-sensing electrode, which overlaps the fourth sub-sensing
electrode in the thickness direction, may be the same as each
other.
According to an exemplary embodiment of the present disclosure, a
touch sensor includes a first touch conductive layer which includes
a first transparent conductive material. A touch insulating layer
is disposed on the first touch conductive layer. A second touch
conductive layer is disposed on the touch insulating layer and
includes a second transparent conductive material. The first touch
conductive layer includes a plurality of first sub-sensing
electrodes arranged in a first direction, a connecting portion
configured to connect the first sub-sensing electrodes adjacent to
each other, and a plurality of second sub-sensing electrodes, which
are arranged in a second direction crossing the first direction,
and are spaced apart from the first sub-sensing electrodes and the
connecting portion. The second touch conductive layer includes a
third sub-sensing electrode electrically connected to one of the
first sub-sensing electrodes through a plurality of first contact
holes passing through the touch insulating layer. A fourth
sub-sensing electrode is electrically connected to one of the
second sub-sensing electrodes through a plurality of second contact
holes passing through the touch insulating layer so as to
electrically connect the second sub-sensing electrodes adjacent to
each other, and the fourth sub-sensing electrode is spaced apart
from the third sub-sensing electrode.
The third sub-sensing electrode may at least partially overlap the
first sub-sensing electrode. The fourth sub-sensing electrode at
least partially overlaps the second sub-sensing electrode. The
fourth sub-sensing electrode extends primarily in the second
direction. The fourth sub-sensing electrode at least partially
overlaps the connecting portion in a thickness direction and is
electrically insulated from the connecting portion.
The touch sensor may further include a third touch conductive layer
disposed between the first touch conductive layer and the touch
insulating layer. The third touch conductive layer may include an
opaque conductive material. The touch sensor may thither include a
plurality of touch wires connected to the plurality of first
sub-sensing electrode or the plurality of second sub-sensing
electrode. The touch wire may include a first wire portion and a
second wire portion disposed on the first wire portion. The first
torch conductive layer may further include the first wiring
portion. The third touch conductive layer may further include the
second wiring portion.
It should be noted that objects of the present disclosure are not
limited to the above-mentioned objects, and other unmentioned
objects will be apparent to those skilled in the art from the
following descriptions.
BRIEF DESCRIPTION OF THE DRAWINGS
The above and other aspects and features of the present disclosure
will become more apparent by describing, exemplary embodiments
thereof in detail with reference to the attached drawings, in
which:
FIG. 1 is a plan view illustrating a display device according to an
exemplary embodiment of the present disclosure;
FIG. 2 is a cross-sectional view taken along line I-I' of FIG.
1;
FIG. 3 is a schematic cross-sectional view illustrating a touch
sensor according to an exemplary embodiment of the present
disclosure;
FIG. 4 is a schematic plan view illustrating a display panel
according to an exemplary embodiment of the present disclosure;
FIG. 5 is an exemplary equivalent circuit diagram illustrating a
pixel shown in FIG. 4;
FIG. 6 is a schematic cross-sectional view illustrating a pixel
shown in FIG. 5;
FIG. 7 is an equivalent circuit diagram illustrating a modified
example of the pixel shown in FIG. 4;
FIG. 8 is a plan view illustrating a touch sensor according to an
exemplary embodiment of the present disclosure;
FIG. 9 is an enlarged plan view illustrating area A of FIG. 8;
FIG. 10 is an enlarged view illustrating a portion of FIG. 9;
FIG. 11 is a view illustrating a first sub-sensing electrode, a
second sub-sensing electrode, and a connecting portion of FIG.
10;
FIG. 12 is a view illustrating a third sub-sensing electrode and a
fourth sub-sensing electrode of FIG. 10;
FIG. 13 is a cross-sectional view taken along line II-II' of FIG.
10;
FIG. 14 is a cross-sectional view taken along line III-III' of FIG.
10;
FIG. 15 is a cross-sectional view taken along line IV-IV' of FIG.
10;
FIG. 16 is an enlarged view of area B of FIG. 8;
FIG. 17 is a view illustrating a first wiring portion of FIG.
16;
FIG. 18 is a view illustrating the first wiring portion and a
second wiring portion of FIG. 16;
FIG. 19 is a cross-sectional view taken along line V-V' of FIG.
16;
FIG. 20 is a plan view of a portion of a touch sensor according to
an exemplary embodiment of the present disclosure;
FIG. 21 is a cross-sectional view of FIG. 20;
FIG. 22 is a plan view illustrating a portion of a touch sensor
according to an exemplary embodiment of the present disclosure;
FIG. 23 is a cross-sectional view of FIG. 22;
FIG. 24 is a plan view illustrating a portion of a touch sensor
according to an exemplary embodiment of the present disclosure;
FIG. 25 is a cross-sectional view of FIG. 24;
FIG. 26 is a plan view illustrating a portion of a touch sensor
according to an exemplary embodiment of the present disclosure;
FIG. 27 is a cross-sectional view of FIG. 26;
FIG. 28 is a plan view illustrating a portion of a touch sensor
according to an exemplary embodiment of the present disclosure;
FIG. 29 is a cross-sectional view taken along line VI-VI' of FIG.
28;
FIG. 30 is a cross-sectional taken along line VII-VII' of FIG.
28;
FIG. 31 is a modified example of an embodiment of FIG. 19;
FIG. 32 is a plan view illustrating a portion of a touch sensor
according to an exemplary embodiment of the present disclosure;
and
FIG. 33 is a cross-sectional view of FIG. 32.
DETAILED DESCRIPTION OF THE EMBODIMENTS
In describing exemplary embodiments of the present disclosure
illustrated in the drawings, specific terminology is employed for
sake of clarity. However, the present disclosure is not intended to
be limited to the specific terminology so selected, and it is to be
understood that each specific element includes all technical
equivalents which operate in a similar manner.
It will be understood that when an element is referred to as being
related to another element such as being "coupled" or "connected"
to another element, it can be directly coupled or connected to the
other element or intervening elements may be present therebetween.
Other expressions that explain the relationship between elements,
such as "between," "directly between," "adjacent to," or "directly
adjacent to," should be construed in the same way.
Throughout the specification and the figures, the same reference
numerals may refer to the same or like parts.
It will be understood that, although the terms "first," "second,"
"third" etc. may be used herein to describe various elements,
components, regions, layers and/or sections, these elements,
components, regions, layers and/or sections should not be limited
by these terms. These terms are only used to distinguish one
element, component, region, layer or section from another element,
component, region, layer or section. Thus, "a first element,"
"component," "region," "layer" or "section" discussed below could
be termed a second element, component, region, layer or section
without departing from the teachings herein.
As used herein, "a", "an," "the," and "at least one" do not denote
a limitation of quantity, and are intended to include both the
singular and plural, unless the context clearly indicates
otherwise. For example, "an element" has the same meaning as "at
least one element," unless the context clearly indicates otherwise.
"At least one" is not to be construed as limiting "a" or "an." "Or"
means "and/or." As used herein, the term "and/or" includes any and
all combinations of one or more of the associated listed items. It
will be further understood that the terms "comprises" and/or
"comprising," or "includes" and/or "including" when used in this
specification, specify the presence of stated features, regions,
integers, steps, operations, elements, and/or components, but do
not preclude the presence or addition of one or more other
features, regions, integers, steps, operations, elements,
components, and/or groups thereof. However, the phrase "consisting
of" is meant to preclude the presence of other elements.
Furthermore, relative terms, such as "lower" or "bottom" and
"upper" or "top," may be used herein to describe one element's
relationship to another element as illustrated in the Figures. It
will be understood that relative terms are intended to encompass
different orientations of the device in addition to the orientation
depicted in the Figures. For example, if the device in one of the
figures is turned over, elements described as being on the "lower"
side of other elements would then be oriented on "upper" sides of
the other elements. The exemplary term "lower," can therefore,
encompasses both an orientation of "lower" and "upper," depending
on the particular orientation of the figure. Similarly, if the
device in one of the figures is turned over, elements described as
"below" or "beneath" other elements would then be oriented "above"
the other elements. The exemplary terms "below" or "beneath" can,
therefore, encompass both an orientation of above and below.
"About" or "approximately" as used herein is inclusive of the
stated value and means within an acceptable range of deviation for
the particular value as determined by one of ordinary skill in the
an, considering the measurement in question and the error
associated with measurement of the particular quantity (i.e., the
limitations of the measurement system). For example, "about" can
mean within one or more standard deviations, or within .+-.30%,
20%, 0% or 5% of the stated value.
Exemplary embodiments of the present disclosure are described
herein with reference to cross section illustrations that are
schematic illustrations of idealized embodiments. As such,
variations from the shapes of the illustrations as a result, for
example, of manufacturing techniques and/or tolerances, may be
expected. For example, a region illustrated or described as flat
may, typically, have rough and/or nonlinear features. Moreover,
sharp angles that are illustrated may be rounded. Thus, the regions
illustrated in the figures are schematic in nature and their shapes
are not intended to illustrate the precise shape of a region and
are not intended to limit the scope of the present claims.
Hereinafter, exemplary embodiments of the present disclosure will
be described with reference to the attached drawings.
FIG. 1 is a plan view illustrating a display device according to an
exemplary embodiment of the present disclosure, and FIG. 2 is a
cross-sectional view taken along line I-I' of FIG. 1.
According to exemplary embodiments of the present disclosure, a
first direction DR1 and a second direction DR2 are different
directions which intersect each other. In the plan view of FIG. 1
the first direction DR1, which is a horizontal direction, and the
second direction DR2, which is a vertical direction, are defined
for convenience of description. In the following exemplary
embodiments, it is assumed that one side in the first direction DR1
indicates a rightward direction in the plan view, the other side in
the first direction DR1 indicates a leftward direction in the plan
view, one side in the second direction DR2 indicates an upward
direction in the plan view, and the other side in the second
direction DR2 indicates a downward direction in the plan view.
However, the directions mentioned in the provided exemplary
embodiments should be understood as relative directions, and the
invention is not necessarily limited by the mentioned
directions.
Referring to FIGS. 1 and 2, a display device 1 may refer to any
electronic device that provides a display screen. Examples of the
display device 1 may include a television, a laptop computer, a
computer monitor, an electronic billboard, a smart-device such as
the Internet of Things, as well as portable electronic devices such
as a mobile phone, a smartphone, a tablet computer, a personal
computer (PC), an electronic watch, a smartwatch, a watch phone, a
mobile communication terminal, an electronic notepad, an electronic
book, a portable multimedia player (PMP), a navigation system, a
earning device, and a digital camera that provide a display
screen.
The display device 1, according to exemplary embodiments of the
present disclosure may include two short sides extending primarily
in the first direction DR1 and two long sides extending primarily
in the second direction DR2. In the plan view, the display device 1
may have a rectangular shape in which corners where the long sides
and the short sides meet are right-angled. However, the present
disclosure is not necessarily limited thereto, and the display
device 1 may have various other shapes in the plan view, such as a
rectangular shape with round corners, a square shape, other
polygonal shapes, a circular shape, or an elliptical shape.
The display device 1 includes a display area DA, which includes a
plurality of pixels, and a non-display area NDA disposed around the
display area DA so as to at least partially surround the display
are DA. The non-display area might not include any pixels. The
display area DA may be an area in which an image is displayed, and
the non-display area NDA may be an area in which an image is not
displayed. However, in some exemplary embodiments of the present
disclosure, in the non-display area NDA, an image may be displayed
in limited portions thereof that are adjacent to the display area
DA.
In some exemplary embodiments of the present disclosure, the shape
of the display area DA may be substantially the same as the shape
of the display device 1 in the plan view. For example, the display
area DA may have a rectangular shape in the plan view.
The non-display area NDA may be disposed around the display area
DA. In the plan view, the non-display area NDA may surround all
sides (in the drawings, four sides) of the display area DA.
However, the present disclosure is not necessarily limited thereto
and the non-display area NDA may partially surround the display
area DA so as to contact three, two or one side thereof. In the
non-display area NDA, a panel driving circuit which drives a
display panel, signal pads connected to the panel driving circuit,
a touch driving circuit which inputs a signal to a touch sensor and
receives a signal output from the touch sensor, or a touch pad
portion connected to the touch driving circuit may be disposed.
In a stacked structure thereof, which may be seen in FIG. 2, the
display device 1 may include a display panel DP and a touch sensor
TSL disposed on the display panel DP. The display device 1 may
further include a polarizing film POL disposed on the touch sensor
TSL and a window WD disposed on the polarizing film POL.
The display panel DP may include a self-emitting element. The
self-emitting element may include at least one of an organic light
emitting diode, a quantum dot light emitting diode, an inorganic
matter-based micro light emitting diode (e.g., a micro light
emitting diode), and an inorganic matter-based nano light emitting
diode (e.g., a nano light emitting diode). Hereinafter, for
convenience of description, a case in which the self-emitting
element is an organic light emitting diode will be described as an
example.
In a stacked structure thereof, the display panel DP includes a
first substrate 110, a second substrate 210 disposed on the first
substrate 110, and an element layer DSL disposed between the first
substrate 110 and the second substrate 210. Also, the display panel
DP may further include a sealing material S which is disposed at
edge portions of the first substrate 110 and the second substrate
210, between the first substrate 110 and the second substrate 210,
so as to adhere the first substrate 110 and the second substrate
210 to each other.
The first substrate 110 is a substrate which supports the element
layer DSL. In an exemplary embodiment of the present disclosure,
the first substrate 110 may be an insulating substrate formed of
glass, quartz, ceramic, plastic, or the like.
The element layer DSL is disposed on the first substrate 110. In an
exemplary embodiment of the present disclosure, the element layer
DSL may include a thin film transistor TFT, a capacitor, a light
emitting element, and a plurality of display signal lines that are
disposed on the first substrate 110. The plurality of display
signal lines may include a scan line which transmits a scan signal
to each of the pixels and a data line which transmits a data signal
to each of the pixels.
The second substrate 210 may be an encapsulation substrate which
prevents permeation of moisture and oxygen from the outside to the
element layer DSL. The second substrate 210 may be formed of
transparent glass. However, the present disclosure is not
necessarily limited thereto, and the second substrate 210 may also
be formed of a polymer film or the like.
The sealing material S may be disposed between the first substrate
110 and the second substrate 210. The sealing material S may be
disposed in the non-display area NDA so as to completely surround
the display area DA in the plan view. The sealing material S may
bond the first substrate 110 and the second substrate 210 to each
other and may prevent permeation of impurities such as moisture and
oxygen from the outside into a portion between the first substrate
110 and the second substrate 210. In some exemplary embodiments of
the present disclosure, the sealing material S may be formed by
placing a sealing material such as glass frit between the first
substrate 110 and the second substrate 210 and irradiating the
sealing material with laser to melt the sealing material.
The touch sensor TSL may be disposed on the display panel DP. The
touch sensor TSL may be a capacitance-type sensor and may obtain
coordinates of a touch input point. The capacitance type may be a
self-capacitance type or a mutual capacitance type. Hereinafter,
for convenience of description, a case in which the touch sensor
TSL is formed to have a mutual capacitance-type structure will be
described as an example, but the present invention is not
necessarily limited thereto.
In an exemplary embodiments of the present disclosure, the touch
sensor TSL may be disposed on the second substrate 210 in the
display panel DP.
In some exemplary embodiments of the present disclosure, a portion
of the touch sensor TSL that is disposed in the display area DA may
include an electrode portion, and a portion of the touch sensor TSL
that is disposed in the non-display area NDA may include a touch
signal line which transmits and/or receives a signal to and/or from
the electrode portion and a touch pad portion connected to the
touch signal line.
In some exemplary embodiments of the present disclosure, a separate
adhering layer (e.g., an adhesive layer or the like) might not be
disposed between the touch sensor TSL and the second substrate 210.
For example, at least one of the electrode portion, the touch
signal line, and the touch pad portion of the touch sensor TSL may
be disposed immediately above the second substrate 210.
Alternatively, when a separate insulating film is disposed between
the touch sensor TSL and the second substrate 210, at least one of
the electrode portion, the touch signal line, and the touch pad
portion of the touch sensor TSL may be disposed immediately above
the insulating film.
The polarizing film POL may be disposed on the touch sensor TSL.
The polarizing film POL may serve to reduce external light
reflection.
The window WD may be disposed on the polarizing film POL. The
window WD may include a rigid material such as glass or quartz.
A stacked structure of the touch sensor TSL will be described
below.
FIG. 3 is a schematic cross-sectional view illustrating a touch
sensor according to an exemplary embodiment of the present
disclosure.
Referring to FIG. 3, the touch sensor TSL may include a first
conductive layer ML1 disposed on the second substrate 210, a second
conductive layer ML2 disposed on the first conductive layer ML1, an
insulating layer ILD disposed on the second conductive layer ML2,
and a third conductive layer ML3 disposed on the insulating layer
ILD.
The first conductive layer ML1 may include a plurality of first
sub-sensing electrodes 311 (see FIG. 9) disposed in a sensing area
SA (see FIG. 8) which will be described below, a connecting portion
313 (see FIG. 9) which connects the first sub-sensing electrodes
which are adjacent to each connecting portion 313 and 315.
Second sub-sensing electrodes 331 (see FIG. 9) may be physically
spaced apart from the first sub-sensing electrodes. The second
sub-sensing electrodes may be electrically insulated from the first
sub-sensing electrodes. The first conductive layer ML1 may further
include a first wiring portion LP1 (see FIG. 16) of a touch signal
line disposed in a non-sensing area NSA (see FIG. 8) which will be
described below.
The first conductive layer ML1 may include a conductive material
having light transmittance. As used herein, the phrase "having
light transmittance" that the material at least partially
transparent or translucent. Examples of the conductive material
having transmittance include indium tin oxide (ITO), indium zinc
oxide (IZO), Aluminum-doped zinc oxide (AZO), indium tin zinc oxide
(ITZO), zinc oxide (ZnO), tin oxide (SnO.sub.2), carbon nanotube,
graphene, conductive polymer (e.g.,
poly(3,4-ethylenedioxythiophene) (PEDOT)), and silver nanowire
(AgNW). As will be described below, the sensing area at least
partially overlaps the display area DA of the display panel DP. The
first sub-sensing electrode, the second sub-sensing electrode, and
the connecting portion, which are disposed in the sensing area, may
include the conductive material having light transmittance and
cause light output from the display panel DP to transmit
therethrough.
In an exemplary embodiment of the present disclosure, the first
conductive layer ML1 may be formed including ITO having an
amorphous structure. The resistance of ITO having an amorphous
structure in which interatomic distances are not uniform may be
relatively higher than the resistance of a material of the second
conductive layer ML2 which will be described below, and further, be
higher than the resistance of ITO having a crystalline structure in
which interatomic distances are more uniform than in the amorphous
structure. In this way, when the resistance of a conductive layer
constituting the touch sensor TSL is high, the power consumed to
drive the touch sensor TSL may increase. Also, when the materials
listed above as examples of the material of the first conductive
layer ML1 are used in the electrode portion that recognizes a touch
input, e.g., the sub-sensing electrodes in the sensing area, or
used in the connecting portion, a resistive-capacitive (RC) delay
may occur due to high resistance. Therefore, for the conductive
layer constituting the electrode portion of the touch sensor TSL to
have low resistance while having light transmittance, the third
conductive layer ML3, which will be described below, may be
electrically connected to the first conductive layer ML1 in the
electrode portion.
The second conductive layer ML2 may include a second wiring portion
LP2 (see FIG. 16) disposed in the non-sensing area. The second
conductive layer ML2 might not be disposed in the sensing area.
The second conductive layer ML2 may include an opaque conductive
material. For example, the second conductive layer ML2 may include
metals such as gold (Au), silver (Ag), aluminum (Al), molybdenum
(Mo), chromium (Cr), titanium (Ti), nickel (Ni), neodymium (Nd),
copper (Cu), and platinum (Pt) or alloys thereof. In some exemplary
embodiments of the present disclosure, the second conductive layer
ML2 may be formed of a single-layer structure or a multi-layer
structure. As an example, the second conductive layer ML2 may have
a Ti/Al/Ti three-layer structure.
The insulating layer ILD may be disposed on the second conductive
layer ML2. The insulating layer ILD may be disposed across the
sensing area and the non-sensing area. The insulating layer ILD may
be disposed between the first conductive layer ML1 and the second
conductive layer ML2. In some exemplary embodiments of the present
disclosure, the insulating layer ILD may include an insulating
material. In some exemplary embodiments of the present disclosure,
the insulating material may be an inorganic insulating material or
an organic insulating material. The inorganic insulating material
may include at least one of aluminum oxide, titanium oxide, silicon
oxide, silicon oxynitride, zirconium oxide, and hafnium oxide. The
organic insulating material may include at least one of acrylic
resin, methacrylate resin, polyisoprene, vinyl resin, epoxy resin,
urethane resin, cellulose resin, siloxane resin, polyimide resin,
polyamide resin, and perylene resin.
The third conductive layer ML3 may be disposed on the insulating
layer ILD. The third conductive layer ML3 may include a third
sub-sensing electrode 315 (see FIG. 9) and a fourth sub-sensing
electrode 335 (see FIG. 9) which are both disposed in the sensing
area. The third sub-sensing electrode and the fourth sub-sensing
electrode may be electrically connected to the first sub-sensing
electrode and the second sub-sensing electrode disposed in the
first conductive layer ML1, respectively, and, accordingly, the
resistance of the electrode portion itself of the sensing area may
be lowered. This will be described in more detail below. The third
conductive layer ML3 may further include a cap pattern LP3 (see
FIG. 16) disposed in the non-sensing area.
The third conductive layer ML3 may include a conductive material
having light transmittance. Examples of the conductive material
having light transmittance include ITO, IZO, AZO, ITZO, ZnO,
SnO.sub.2, carbon nanotube, graphene, conductive polymer (e.g.,
PEDOT), and AgNW. In some exemplary embodiments of the present
disclosure, the third conductive layer ML3 may include the same
material as the first conductive layer ML1.
FIG. 4 is a schematic plan view illustrating a display panel
according to an exemplary embodiment of the present disclosure,
FIG. 5 is an exemplary equivalent circuit diagram of a pixel
illustrated in FIG. 4, and FIG. 6 is a schematic cross-sectional
view of a pixel illustrated in FIG. 5.
Referring to FIG. 4, a plurality of signal lines SGL may be
disposed on the first substrate 110 in the display area DA of the
display panel DP, and a signal pad portion DPD may be disposed on
the first substrate 110 in the non-display area NDA. The display
area DA may include a plurality of pixels PX. The sealing material
S, which completely surrounds the display area DA, may be disposed
on the first substrate 110 in the non-display area NDA.
The signal lines SGL and the signal pad portion DPD may be included
in the element layer DSL.
The signal lines SGL may include scan lines GL, data lines DL, and
power lines PL. Each scan line GL is connected to the plurality of
pixels PX and transmits a scan signal to the corresponding pixels
PX. Each data line DL is connected to the plurality of pixels PX
and transmits a data signal to the corresponding pixels PX. The
power line PL is connected to the plurality of pixels PX and
transmits a driving voltage to each pixel PX.
The signal pad portion DPD may be disposed in the non-display area
NDA and connected to the signal lines SGL such as the data lines
DL. The signal pad portion DPD may receive a data signal from an
external element, e.g., a panel driving circuit which drives the
display panel DP.
In an exemplary embodiment of the present disclosure, each scan
line may extend primarily in the first direction DR1 and each data
line DL may extend primarily in the second direction DR2. In some
exemplary embodiments of the present disclosure, the power line PL
may extend primarily in the second direction DR2 like the data line
DL, but the present disclosure is not necessarily limited
thereto.
Referring to FIG. 5, each pixel PX may include a light emitting
element ELD. The light emitting element ELD may be an organic light
emitting diode (OLED) as described above. However, the present
disclosure is not necessarily limited thereto, and the light
emitting element ELD may be any one of a quantum dot light emitting
diode, an inorganic matter-based micro light emitting diode, and an
inorganic matter-based nano light emitting diode. The light
emitting element ELD may be a front-emitting type diode or a
back-emitting type diode.
Each pixel PX may further include, as a pixel driving circuit for
driving the light emitting element ELD, a first transistor T1 (or a
switching transistor), a second transistor T2 (or a driving
transistor), and a capacitor Cst. A first source voltage ELVDD may
be provided to the second transistor T2, and a second source
voltage ELVSS may be provided to the light emitting element ELD.
The second source voltage ELVSS may be a voltage lower than the
first source voltage ELVDD.
The first transistor T1 outputs a data signal applied to the data
line DL response to a scan signal applied to the scan line GL. The
capacitor Cst charges a voltage corresponding to the data signal
received from the first transistor T1. The second transistor T2 is
connected to the light emitting element ELD. The second transistor
T2 controls driving current flowing in the light emitting element
ELD corresponding to a quantity of electric charge stored in the
capacitor Cst.
The equivalent circuit of FIG. 5 is merely an embodiment, and the
present disclosure is not necessarily limited thereto. Each pixel
PX may include three or more transistors and include a larger
number of capacitors than what is shown and described herein.
In FIG. 6, a cross-section of a portion of the display panel DP
corresponding to the equivalent circuit illustrated in FIG. 5 is
illustrated, and the second substrate 210 and the touch sensor TSL
are also illustrated together. Further, the polarizing film POL and
the window WD are also illustrated together.
A buffer film BFL may be disposed on the first substrate 110.
A semiconductor pattern OSP1 (hereinafter referred to as "first
semiconductor pattern OSP1") of the first transistor T1 and a
semiconductor pattern OSP2 (hereinafter referred to as "second
semiconductor pattern OSP2") of the second transistor T2 may be
disposed on the buffer film BFL. Materials of the first
semiconductor pattern OSP1 and the second semiconductor pattern
OSP2 may be selected from the group consisting of amorphous
silicon, polysilicon, and metal oxide semiconductor. In some
exemplary embodiments of the present disclosure, any one of the
first semiconductor pattern OSP1 and the second semiconductor
pattern OSP2 may be formed of polysilicon, and the other one of the
first semiconductor pattern OSP1 and the second semiconductor
pattern OSP2 may be formed of metal oxide semiconductor.
A gate insulating film 111 is disposed on the first semiconductor
pattern OSP1 and the second semiconductor pattern OSP2. A control
electrode GE1 (hereinafter referred to as "first gate electrode
GE1") of the first transistor T1 and a control electrode GE2
(hereinafter referred to as "second gate electrode GE2") of the
second transistor T2 are disposed on the gate insulating film 111.
When the first gate electrode GE1 and the second gate electrode GE2
are disposed on the same layer, the first gate electrode GE1 and
the second gate electrode GE2 may be manufactured according to the
same photolithography process as the scan lines GL (see FIG. 5).
However, the present disclosure is not necessarily limited thereto,
and the first gate electrode GE1 and the second gate electrode GE2
may be disposed on different layers. In such a case, only one of
the first gate electrode GE1 and the second gate electrode GE2 may
be manufactured according to the same photolithography process as
the scan lines GL (see FIG. 5).
A second gate insulating film 112, which covers the first gate
electrode GE1, and the second gate electrode GE2 are disposed on
the gate insulating film 111. On the second gate insulating film
112, a drain electrode DE1 (hereinafter referred to as "first drain
electrode DE1") and a source electrode SE1 (hereinafter referred to
as "first source electrode SE1") of the first transistor T1 and a
drain electrode DE2 (hereinafter referred to as "second drain
electrode DE2") and a source electrode SE2 (hereinafter referred to
as "second source electrode SE2") of the second transistor T2 are
disposed.
The first drain electrode DE1 and the first source electrode SE1
are connected to the first semiconductor pattern OSP1 through an
input contact hole CNTa and an output contact hole CNTb which pass
through the gate insulating film 111 and the second gate insulating
film 112. The second drain electrode DE2 and the second source
electrode SE2 are connected to the second semiconductor pattern
OSP2 through an input contact hole CNTc and an output contact hole
CNTd which pass through the gate insulating film 111 and the second
gate insulating film 112. In an exemplary embodiment of the present
disclosure, one of the first transistor T1 and the second
transistor T2 may be modified to have a bottom gate structure.
An intermediate organic film 113, which covers the first drain
electrode DE1, the second drain electrode DE2, the source electrode
SE1, and the second source electrode SE2 is disposed on the second
gate insulating film 112. The intermediate organic film may provide
a planar surface.
A pixel defining film PDL and the light emitting element ELD may be
disposed on the intermediate organic film 113. The pixel defining
film PDL may include an organic material. An anode electrode AE is
disposed on the intermediate organic film 113. The anode electrode
AE is connected to the second source electrode SE2 through an anode
contact hole CNT3 passing through the intermediate organic film
113. An opening OPN is defined in the pixel defining film PDL. The
opening OPN of the pixel defining film PDL exposes at least a
portion of the anode electrode AE.
The pixel PX of the display area DA may include a light emitting
area EMA and a non-light emitting area NEM adjacent to the light
emitting area EMA. The non-light emitting area NEM may at least
partially surround the tight emitting area EMA. In the present
embodiment, the light emitting area EMA is defined corresponding to
a partial area of the anode electrode AE exposed by the opening
OPN.
A hole injection/transport layer HCL may be disposed in common in
the light emitting area EMA and the non-light emitting area NEM.
The hole injection/transport layer HCL may be formed in common in
the pixels PX, but the present disclosure is not necessarily
limited thereto.
A light emitting layer EML is disposed on the hole
injection/transport layer HCL. The light emitting layer EML may
generate light of a predetermined color. The light emitting layer
EML may be disposed in an area corresponding to the opening OPN.
For example, the light emitting layer EML may be separately formed
in each of the pixels PX.
When the light emitting element ELD is an organic light emitting
element, the light emitting layer EML may include an organic
material. For example, in some exemplary embodiments of the present
disclosure, the light emitting layer EML may be an organic light
emitting layer.
In the present embodiment a patterned light emitting layer EML is
illustrated as an example, but the light emitting layer EML may
also be disposed in common in the pixels PX. In this case, the
light emitting layer EML may generate white light. In some
exemplary embodiments of the present disclosure, the light emitting
layer EML may haw a multi-layer structure referred to as "tandem
structure."
An electron injection/transport layer ECL is disposed on the light
emitting layer EML. The electron injection/transport layer ECL may
be formed in common in the pixels PX, but the present disclosure is
not necessarily limited thereto.
A cathode electrode CE is disposed on the electron
injection/transport layer ECL. The cathode electrode CE is disposed
in common in the pixels PX.
The second substrate 210 may be disposed on the cathode electrode
CE, and the cathode electrode CE and the second substrate 210 may
be spaced apart from each other. The above-described touch sensor
TSL may be disposed on the second substrate 210.
The anode electrode AE, the hole injection/transport layer HCL, the
light emitting layer EML, the electron injection/transport layer
ECL, and the cathode electrode CE, which are disposed in the light
emitting area EMA may constitute the light emitting element
ELD.
FIG. 7 is an equivalent circuit diagram according to a modified
example of the pixel illustrated in FIG. 4.
Referring to FIG. 7, each pixel may include a light emitting
element ELD, a plurality of transistors T1 to T7, and a capacitor
Cst. The capacitor Cst may include a first electrode and a second
electrode.
Each of the transistors T1 to T7 includes a gate electrode, a first
electrode, and a second electrode. Any one of the first electrode
and the second electrode of each of the transistors T1 to T7 is a
source electrode, and the other one thereof is a drain
electrode.
The gate electrode of the first transistor T1 is connected to the
first electrode of the capacitor Cst. The first electrode of the
first transistor T1 is connected to the power line PL, which
provides the first source voltage ELVDD, via the fifth transistor
T5. The second electrode of the first transistor T1 is connected to
the anode electrode of the light emitting element ELD via the sixth
transistor T6. The first transistor T1 receives a data signal
according to a switching operation of the second transistor T2 and
supplies driving current to the light emitting element ELD.
The gate electrode of the second transistor T2 is connected to a
first scan line GL1 to which a first scan signal is provided. The
first electrode of the second transistor T2 is connected to a data
line DL to which a data signal is provided. The second electrode of
the second transistor T2 is connected to the power line PL, to
which the first source voltage ELVDD is provided, via the fifth
transistor T5 while being connected to the first electrode of the
first transistor T1. The second transistor T2 is turned on
according to the first scan signal and performs a switching
operation in which a data signal is transmitted to the first
electrode of the first transistor T1.
The gate electrode of the third transistor T3 is connected to the
first scan line GL1 to which the first scan signal is provided. The
first electrode of the third transistor T3 is connected to the
anode electrode of the light emitting element ELD via the sixth
transistor T6 while being connected to the second electrode of the
first transistor T1. The second electrode of the third transistor
T3 is simultaneously connected to the first electrode of the
capacitor Cst, the first electrode of the fourth transistor T4, and
the gate electrode of the first transistor T1. The third transistor
T3 is turned on according to the first scan signal and connects the
gate electrode and the second electrode of the first transistor T1
to each other so that the first transistor T1 is diode-connected.
Accordingly, a voltage difference occurs, as much as a threshold
voltage of the first transistor T1, between the first electrode and
the gate electrode of the first transistor T1, and variations in
the threshold voltage of the first transistor T1 may be compensated
for by supplying a data signal, which is compensated for by the
threshold voltage, to the gate electrode of the first transistor
T1.
The gate electrode of the fourth transistor T4 is connected to a
second scan line GL2 to which a second scan signal is provided. The
second electrode of the fourth transistor T4 is connected to an
initialization voltage line VINTL to which an initialization
voltage is provided. The first electrode of the fourth transistor
T4 is simultaneously connected to the first electrode of the
capacitor Cst, the second electrode of the third transistor T3, and
the gate electrode of the first transistor T1. The fourth
transistor T4 is turned on according to the second scan signal and
performs an operation in which the initialization voltage is
transmitted to the gate electrode of the first transistor T1 to
initialize the voltage of the gate electrode of the first
transistor T1.
The gate electrode of the fifth transistor T5 is connected to a
light emission control line EMSL to which a light emission control
signal is provided. The first electrode of the fifth transistor T5
is connected to the power line PL to which the first source voltage
is provided. The second electrode of the fifth transistor T5 is
connected to the first electrode of the first transistor T1 and the
second electrode of the second transistor T2.
The gate electrode of the sixth transistor T6 is connected to the
light emission control line EMSL to which the light emission
control signal is provided. The first electrode of the sixth
transistor T6 is connected to the second electrode of the first
transistor T1 and the first electrode of the third transistor T3.
The second electrode of the sixth transistor T6 is connected to the
anode electrode of the light emitting element ELD.
The fifth transistor T5 and the sixth transistor T6 are
simultaneously turned on according to the light emission control
signal and accordingly, driving current flows in the light emitting
element ELD.
The gate electrode of the seventh transistor T7 is connected to a
third scan line GL3 which provides a third scan signal. The first
electrode of the seventh transistor T7 is connected to the anode
electrode of the light emitting element ELD. The second electrode
of the seventh transistor T7 is connected to the initialization
voltage line VINTL. The seventh transistor T7 is turned on
according to the third scan signal and initializes the anode
electrode of the light emitting element ELD.
The second electrode of the capacitor Cst is connected to the power
line PL. The first electrode of the capacitor Cst is simultaneously
connected to the gate electrode of the first transistor T1, the
second electrode of the third transistor T3, and the first
electrode of the fourth transistor T4. The second source voltage
ELVSS may be provided to the cathode electrode of the light
emitting element ELD.
The light emitting element ELD receives driving current from the
first transistor T1 and emits light so that an image is
displayed.
FIG. 8 is a plan view of a touch sensor according to an exemplary
embodiment of the present disclosure. FIG. 9 is an enlarged plan
view of area A of FIG. 8. FIG. 10 is an enlarged view of a portion
of FIG. 9.
Referring to FIG. 3 and FIGS. 8 to 10, as described above, the
touch sensor TSL is disposed on the second substrate 210. For
example, the second substrate 210 may serve as a base layer of the
touch sensor TSL.
The sensing area SA and the non-sensing area NSA are defined in the
touch sensor TSL. The sensing area SA is an area of the touch
sensor TSL that senses a touch input. The non-sensing area NSA does
not directly sense a touch input, but may serve to prevent coupling
between touch signal lines connected to electrode portions sensing
a touch input and prevent the touch signal lines from being
disconnected due to static electricity. For example, a touch ground
wire adjacent to the touch signal lines, a touch static electricity
preventing wire adjacent to the touch signal lines, and the like
may be disposed in the non-sensing area NSA and serve to assist in
sensing a touch input by the sensing area SA.
The sensing area SA may correspond to the display area DA of the
display device 1 illustrated in FIG. 1 or the display area DA of
the display panel DP illustrated in FIG. 4. Also, the non-sensing
area NSA may correspond to the non-display area NDA of the display
device 1 illustrated in FIG. 1 or the non-display area NDA of the
display panel DP illustrated in FIG. 4. In some exemplary
embodiments of the present disclosure, the sensing area SA may he
substantially the same as the display area DA of the display panel
DP, and the non-sensing area. NSA may be substantially the same as
the non-display area NDA of the display panel DP.
The touch sensor TSL may include a first electrode portion 310 and
a second electrode portion 330 and may further include touch signal
lines TL1 and TL2 and touch pad portions TPD1 and TPD2.
The first electrode portion 310 and the second electrode portion
330 may be disposed in the sensing area SA, and the touch pad
portions TPD1 and TPD2 and the touch signal lines TL1 and TL2 may
be disposed in the non-sensing area NSA. One end of the first touch
signal line TL1 may be connected to the first electrode portion
310, the other end of the first touch signal line TL1 may be
connected to the first touch pad portion TPD1, one end of the
second touch signal line TL2 may be connected to the second
electrode portion 330, and the other end of the second touch signal
line TL2 may be connected to the second touch pad portion TPD2. The
first touch signal line TL1 may be provided as a plurality of first
touch signal lines TL1, and the second touch signal line TL2 may be
provided as a plurality of second touch signal line TL2.
Hereinafter, the sensing area SA will be described in more
detail.
The first electrode portion 310 and the second electrode portion
330 insulated from the first electrode portion 310 may be disposed
on the second substrate 210. Any one of the first electrode portion
310 and the second electrode portion 330 may be a driving
electrode, and the other one thereof may be a sensing electrode. In
the present embodiment, a case in which the first electrode portion
310 is a driving electrode and the second electrode portion 330 is
a sensing electrode will be described as an example. When the first
electrode portion 310 is a driving electrode and the second
electrode portion 330 is a sensing electrode, the first touch
signal line TL1 connected to the first electrode portion 310 may be
a touch driving signal line, and the second touch signal line TL2
connected to the second electrode portion 330 may be a touch
sensing signal line. Likewise, the first touch pad portion TPD1
connected to the first touch signal line TL1 may be a touch driving
pad portion, and the second touch pad portion TPD2 connected to the
second touch signal line TL2 may be a touch sensing pad
portion.
The first electrode portion 310 may extend primarily in the second
direction DR2. The first electrode portion 310 may be provided as a
plurality of first electrode portions 310, and the plurality of
first electrode portions 310 may be spaced apart from each other in
the first direction DR1. Each first electrode portion 310 may
include a plurality of first sub-sensing electrodes 311 spaced
apart from each other in the second direction DR2, a connecting
portion 313 which physically connects the first sub-sensing
electrodes 311 adjacent to each other, and a third sub-sensing
electrode 315 disposed on the first sub-sensing electrodes 311 and
electrically connected to the first sub-sensing electrodes 311. The
first sub-sensing electrodes 311 of the first electrode portion 310
and the connecting portion 313, which connects the first
sub-sensing electrodes 311 adjacent to each other, may have a
linear shape extending primarily in the second direction DR2.
The second electrode portion 330 may extend primarily in the first
direction DR1. The second electrode portion 330 may be provided as
a plurality of second electrode portions 330, and the plurality of
second electrode portions 330 may be spaced apart from each other
in the second direction DR2. The second electrode portion 330 may
be electrically insulated from the first electrode portion 310.
Each second electrode portion 330 may include a plurality of second
sub-sensing electrodes 331 spaced apart from each other in the
first direction DR1, and a fourth sub-sensing electrode 335
electrically connected to the second sub-sensing electrodes 331.
The second sub-sensing electrode 331 may be spaced apart from the
first sub-sensing electrode 311 adjacent thereto with a
predetermined separation space SP disposed therebetween and be
electrically insulated from the first sub-sensing electrode 311.
Meanwhile, although the plurality of first sub-sensing electrodes
311 spaced apart from each other in the second direction DR2 are
electrically connected by the connecting portion 313 disposed in
the same layer (the first conductive layer ML1) and form a linear
shape, since, as described above, the plurality of second
sub-sensing electrodes 331, which are disposed in the same layer as
the first sub-sensing electrodes 311 and spaced apart from each
other in the first direction DR1, are insulated from the first
electrode portion 310, the second sub-sensing electrodes 331
adjacent to each other may be electrically connected through the
fourth sub-sensing electrode 335 disposed in a layer (the third
conductive layer ML3) that is different from the first conductive
layer ML1 in which the first sub-sensing electrodes 311, the second
sub-sensing electrodes 331, and the connecting portion 313 are
disposed. The fourth sub-sensing electrode 335 may be spaced apart
from the third sub-sensing electrode 315 adjacent thereto with a
predetermined separation space SP disposed therebetween and be
electrically insulated from the third sub-sensing electrode
315.
The first sub-sensing electrodes 311, the connecting portion 313,
and the second sub-sensing electrode 315 of the first electrode
portion 310 may firm a planar pattern, and the second sub-sensing
electrodes 331 and the fourth sub-sensing electrode 335 of the
second electrode portion 330 may form a planar pattern.
At least some of the first sub-sensing electrodes 311 and the
second sub-sensing electrodes 331 may have a substantially rhombic
shape. Some of the first sub-sensing electrodes 311 and the second
sub-sensing electrodes 331 may have a shape obtained by cutting a
rhombic shape (e.g. a rhombic section shape). For example, all the
first sub-sensing electrodes 311 and the second sub-sensing
electrodes 331 except for those disposed at both end portions in an
extending direction may have a rhombic shape, and the first
sub-sensing electrodes 311 and the second sub-sensing electrodes
331 disposed at the both end portions in the extending direction
may have a triangular shape obtained by cutting a rhombic shape in
half.
In the present specification, the "rhombic shape" or "substantially
rhombic shape" not only includes a shape formed by connecting four
line segments, each having a completely linear shape, extending in
arbitrary directions, but also includes a shape formed by
connecting curves or concave and convex portions, as long as line
segments formed by roughly connecting the curves or concave and
convex portions constitute a rhombic shape.
For example, as illustrated in FIGS. 9 and 10, concave and convex
portions may be formed in at least some sections of the line
segments constituting a rhombic shape of the first sub-sensing
electrodes 311 and the second sub-sensing electrodes 331. The line
segments opposing each other of the first sub-sensing electrodes
311 and the second sub-sensing electrodes 331 may each include
concave and convex portions, and the opposing line segments
including the concave and convex portions may extend while
maintaining the same separation distance therebetween. For example,
when a line segment of the first sub-sensing electrode 311 includes
a convex portion, a concave portion, and a convex portion in that
order, correspondingly, a line segment of the second sub-sensing
electrode 331 adjacent thereto opposing the line segment of first
sub-sensing electrode 311 may include a concave portion, a convex
portion, and a concave portion in that order. A separation space SP
between the first sub-sensing electrode 311 and the second
sub-sensing electrode 331 whose opposing line segments include the
concave and convex portions may have a zigzag shape.
Since concave and convex portions are formed in at least some
sections of the line segments constituting a rhombic shape of the
first sub-sensing electrodes 311 and the second, sub-sensing
electrodes 331 when a user views an image on the display device 1,
the Moire phenomenon due to the first sub-sensing electrodes 311
and the second sub-sensing electrodes 331 may be prevented.
The sizes and shapes of the first sub-sensing electrodes 311 each
having a rhombic shape and the second sub-sensing electrodes 331
each having a rhombic shape may be substantially the same as each
other. The sizes and shapes of the first sub-sensing electrodes 311
each having a triangular shape and the second, sub-sensing,
electrodes 331 each having a triangular shape may be substantially
the same as each other. However, the invention is not necessarily
limited to the exemplary embodiments thereof described above, and
the shapes and sizes of the first sub-sensing electrodes 311 and
the second sub-sensing electrodes 331 may be modified in various
ways. For example, the shapes of the first sub-sensing electrodes
311 and the second sub-sensing electrodes 331 may be modified to
various shapes such as a quadrilateral shape, a pentagonal shape, a
circular shape, and a bar shape.
Dummy electrodes DE may be further disposed in the separation space
SP between the first sub-sensing electrodes 311 and the second
sub-sensing electrodes 331. The dummy electrodes DE may be disposed
in the first conductive layer ML1. For example, the first
conductive layer ML1 may further include the dummy electrodes DE
disposed in the separation space SP between the first sub-sensing
electrodes 311 and the second sub-sensing electrodes 331. When the
first sub-sensing electrodes 311 and the second sub-sensing
electrodes 331 are disposed too close to each other, too large a
cap is formed. Therefore, the first sub-sensing electrodes 311 and
the second sub-sensing electrodes 331 may be spaced apart from each
other by the above-described separation space SP therebetween.
Meanwhile, in the separation space SP, a conductive layer is not
disposed, and the insulating layer ILD is exposed through the top.
Due to a refractive index difference between the exposed insulating
layer ILD and the conductive layers adjacent thereto, a pattern may
be recognized from the outside. Thus, by arranging the dummy
electrodes DE in the separation space SP, the extent to which the
pattern is recognized may be decreased.
The dummy electrodes DE may be floating electrodes that are
physically spaced apart from and not electrically connected to the
sub-sensing electrodes 311 and 331 adjacent thereto.
A width of the dummy electrodes IDE may be smaller than a width of
the separation space SP, and the dummy electrodes DE may have
substantially the same shape as the separation space SP between the
first sub-sensing electrodes 311 and the second sub-sensing
electrodes 331. In FIG. 9, the dummy electrodes DE are illustrated
as being formed as a pattern extending primarily in directions in
which the opposing line segments of the first sub-sensing
electrodes 311 and the second sub-sensing electrodes 331 extend.
However, the present disclosure is not necessarily limited thereto,
and the dummy electrodes DE may also be formed as a plurality of
patterns spaced apart in the extending directions.
The third sub-sensing electrode 315 may at least partially overlap
the first sub-sensing electrodes 311 in a thickness direction. The
third sub-sensing electrode 315 of the first electrode portion 310
may be provided as a plurality of third sub-sensing electrodes 315.
Like the arrangement of the plurality of first sub-sensing
electrodes 311, the plurality of third sub-sensing electrodes 315
of the first electrode portion 310 may be spaced apart from each
other in the second direction DR2. The third sub-sensing electrodes
315 might not overlap the connecting portion 313 of the first
electrode portion 310. In the plan view, the third sub-sensing
electrodes 315 adjacent to each other in the second direction DR2
may be spaced apart from each other with the connecting portion 313
disposed therebetween. In some exemplary embodiments of the present
disclosure, the third sub-sensing electrodes 315 may partially
overlap the connecting portion 313 of the first electrode portion
310, but even in this case, the third sub-sensing electrodes 315
are spaced apart from the fourth sub-sensing electrode 335.
In the plan view, the insulating layer ILD may include a first
contact hole CNT1 at least partially overlapping the third
sub-sensing electrodes 315. The third sub-sensing electrodes 315
and the first sub-sensing electrodes 311 at least partially
overlapping each other may be electrically connected through the
first contact hole CNT1. In this way, the overall resistance of the
first electrode portion 310 may be lowered. Although, in the
drawings, two first contact holes CNT1 are illustrated as
overlapping a single third sub-sensing electrode 315, the number of
first contact holes CNT1 corresponding to the single third
sub-sensing electrode 315 is not necessarily limited thereto, and
there may be one first contact hole CNT1 or three or more first
contact holes CNT1.
The shape of the third sub-sensing electrode 315 may be
substantially the same as the shape of the first sub-sensing
electrode 311. For example, at least some of the third sub-sensing,
electrodes 315 may have a substantially rhombic shape.
Some third sub-sensing electrodes 315 may have a shape obtained by
cutting a rhombic shape (e.g. a rhombic section). For example, all
the third sub-sensing electrodes 315, except for those disposed at
both end portions in an extending direction, may have a rhombic
shape, and the third sub-sensing electrodes 315 disposed at the
both end portions in the extending direction may have a triangular
shape obtained by cutting a rhombic shape in half.
The sizes and shapes of the first sub-sensing electrodes 311, each
having a rhombic shape, and the third sub-sensing electrodes 315,
each having a rhombic shape, may be substantially the same as each
other. The sizes and shapes of the first sub-sensing electrodes
311, each having a triangular shape, and the third sub-sensing
electrodes 315, each having a triangular shape, may be
substantially the same as each other. Further, like the shape of
the first sub-sensing electrodes 311 overlapping the third
sub-sensing electrodes 315 in the thickness direction, concave and
convex portions may be formed in at least some sections of the line
segments constituting the rhombic shape or triangular shape of the
third sub-sensing electrodes 315. The rhombic shape or triangular
shape of the third sub-sensing electrodes 315 formed by the line
segments in which the concave and convex portions are formed in at
least some section may be the same as the shape of the first
sub-sensing electrodes 311 disposed to overlap the third
sub-sensing electrodes 315 in the thickness direction. For example,
a planar profile of the first sub-sensing electrodes 311
corresponding to the third sub-sensing electrodes 315 in the
thickness direction may be completely the same as a planar profile
of the third sub-sensing electrodes 315.
The fourth sub-sensing electrode 335 may at least partially overlap
the second sub-sensing electrodes 331 and the separation space
between the second sub-sensing electrodes 331 adjacent to each
other in the thickness direction. The fourth sub-sensing electrode
335 of the second electrode portion 330 may have a linear shape
extending primarily in the first direction DR1.
The fourth sub-sensing electrode 335 may at least partially overlap
the connecting portion 313 of the first electrode portion 310.
Because, as described above, the fourth sub-sensing electrode 335
is disposed in the third conductive layer ML3 which is different
from the first conductive layer ML1 in which the connecting portion
313 is disposed, even when the fourth sub-sensing electrode 335
overlap the connecting portion 113 of the first electrode portion
310, the fourth sub-sensing electrode 335 may be electrically
insulated. The fourth sub-sensing electrode 335 may be spaced apart
from the third sub-sensing electrodes 315, which are disposed in
the same layer (the third conductive layer ML3) as the fourth
sub-sensing electrode 335, with the separation space SP disposed
therebetween.
The insulating layer ILD may further include a second contact hole
CNT2 disposed to overlap the fourth sub-sensing electrode 335 in
the plan view. The fourth sub-sensing electrode 335 and the second
sub-sensing electrodes 331 overlapping each other may be
electrically connected through the second contact hole CNT2. In
this way, the overall resistance of the second electrode portion
330 may be lowered. Although, in the drawings, two second contact
holes CNT2 are illustrated as corresponding to a single second
sub-sensing electrode 331, the number of second contact holes CNT2
corresponding to the single second sub-sensing electrode 331 is not
necessarily limited thereto, and there may be one second contact
hole CNT2 or three or more second contact holes CNT2.
The shape of the fourth sub-sensing electrode 335 may be
substantially the same as the linear shape extending primarily in
the second direction DR2 in which the plurality of first
sub-sensing electrodes 311 of the first electrode portion 310,
which are disposed in the second direction DR2, and the connecting
portion 313, which connects the first sub-sensing electrodes 311,
are connected, except that the linear shape of the fourth
sub-sensing electrode 335 extends primarily in the first direction
DR1.
Further, like the shape of the second sub-sensing electrodes 331
overlapping the fourth sub-sensing electrode 335 in the thickness
direction, concave and convex portions may be formed in at least
some sections of the line segments constituting the rhombic shape
or triangular shape of the fourth sub-sensing electrode 335. The
rhombic shape or triangular shape of the fourth sub-sensing
electrodes 335 formed by the line segments in which the concave and
convex portions are formed in at least some section may be the same
as the shape of the second sub-sensing electrodes 335 overlap the
fourth sub-sensing electrode 335 in the thickness direction. For
example, a planar profile of the second sub-sensing electrodes 331
corresponding to the fourth sub-sensing electrode 335 in the
thickness direction may be completely the same as a planar profile
of the fourth sub-sensing electrode 335.
FIG. 11 is a view illustrating, a first sub-sensing electrode, a
second sub-sensing electrode, and a connecting portion of FIG. 10,
and FIG. 12 is a view illustrating a third sub-sensing electrode
and a fourth sub-sensing electrode of FIG. 10.
Referring to FIG. 3 and FIGS. 11 and 12, as described above, the
first sub-sensing electrodes 311, the connecting portion 313, the
second sub-sensing electrodes 331, and the dummy electrode DE may
be disposed in the first conductive layer ML1, and the third
sub-sensing electrodes 315 and the fourth sub-sensing electrode 335
may be disposed in the third conductive layer ML3. The first
sub-sensing electrodes 311 and the connecting portion 313 disposed
in the first conductive layer ML1 may be insulated by being spaced
apart from the second sub-sensing electrodes 331 and the dummy
electrodes DE. The third sub-sensing electrodes 315 and the fourth
sub-sensing electrode 335 disposed in the second conductive layer
ML2 may be insulated by being spaced apart from each other.
Although the plurality of first sub-sensing electrodes 311 spaced
apart from each other in the second direction DR2 are electrically
connected by the connecting portion 313 disposed in the first
conductive layer ML1, because the plurality of second sub-sensing
electrodes 331, which are disposed in the same layer as the first
sub-sensing electrodes 311 and spaced apart from each other in the
first direction DR1, are insulated from the first electrode portion
310, the second sub-sensing electrodes 331 adjacent to each other
may be electrically connected through the fourth sub-sensing
electrode 335 disposed in the third conductive layer ML3.
The third sub-sensing electrodes 315 and the first sub-sensing
electrodes 311 at least partially overlapping each other are
electrically connected, and the fourth sub-sensing electrode 335
and the second sub-sensing electrodes 331 at least partially
overlapping each other are electrically connected. Thus, the
overall resistance of the electrode portions 310 and 330 may be
lowered.
FIG. 13 is a cross-sectional view taken along line II-II' of FIG.
10, FIG. 14 is a cross-sectional view taken along line III-III' of
FIG. 10, and FIG. 15 is a cross-sectional view taken along line
IV-IV' of FIG. 10. In FIGS. 13 to 15, the polarizing film POL
disposed on the touch sensor TSL and the window WD disposed on the
polarizing film POL are illustrated, and a first adhering member
AM1 which adheres the polarizing film POL and the touch sensor TSL
to each other and a second adhering member AM2 which adheres the
polarizing film POL and the window WD to each other are further
illustrated.
First, referring to FIG. 13, the first sub-sensing electrode 311
and the second sub-sensing electrode 331 may be disposed directly
on the second substrate 210. The first sub-sensing electrode 311
and the second sub-sensing electrode 331 may be spaced apart from
each other with the separation space SP disposed therebetween.
The insulating layer ILD may be disposed on the first sub-sensing
electrode 311 and the second sub-sensing electrode 331. The
insulating layer ILD may be disposed directly on upper surfaces of
the first sub-sensing electrode 311 and the second sub-sensing
electrode 331, and, in the separation space SP between the first
sub-sensing electrode 311 and the second sub-sensing electrode 331,
the insulating layer ILD may come into contact with side surfaces
of the first sub-sensing electrode 311 and the second sub-sensing
electrode 331 and come into direct contact with the second
substrate 210, which is exposed.
The fourth sub-sensing electrode 335 may be disposed on the
insulating layer ILD. The fourth sub-sensing electrode 335 may be
disposed directly on the insulating layer ILD and electrically
connected to the second sub-sensing electrode 331 through the
second contact hole CNT2 of the insulating layer ILD.
The first adhering member AM1 may come into direct contact with the
fourth sub-sensing electrode 335. In some exemplary embodiments of
the present disclosure, the polarizing film POL and the first
adhering member AM1 may be omitted. In this case, the second
adhering member AM2, which is disposed at a lower portion of the
window WD, may come into direct contact with the fourth sub-sensing
electrode 335.
Referring to FIG. 14, the third sub-sensing electrode 315 may be
disposed on the insulating layer ILD. The third sub-sensing
electrode 315 may be disposed in the same layer as the fourth
sub-sensing electrode 335. The third sub-sensing electrode 315 may
be disposed directly on the insulating layer ILD. The third
sub-sensing electrode 315 and the fourth sub-sensing electrode 335
may be spaced apart from each other with the separation space SP
disposed therebetween. The third sub-sensing electrode 315 may be
electrically connected to the first sub-sensing electrode 311
therebelow through the first contact hole CNT1 of the insulating
layer ILD.
The first adhering member AM1 may come into direct contact with the
fourth sub-sensing electrode 335 and the third sub-sensing
electrode 315. The first adhering member AM1 may also be disposed
in the separation space SP and come into direct contact with an
upper surface of the insulating layer ILD that is exposed by the
fourth sub-sensing electrode 335 and the third sub-sensing
electrode 315. In some exemplary embodiments of the present
disclosure, the polarizing film POL and the first adhering member
AM1 may be omitted. In this case, the second adhering member AM2
disposed at the lower portion of the window WD may come into direct
contact with the fourth sub-sensing electrode 335 and the third
sub-sensing electrode 315. The second adhering member AM2 may also
be disposed in the separation space SP and come into direct contact
with the upper surface of the insulating layer ILD that is exposed
by the fourth sub-sensing electrode 335 and the third sub-sensing
electrode 315.
Referring to FIG. 15, the dummy electrodes DE may be disposed on
the second substrate 210. The dummy electrodes DE may be disposed
directly on the second substrate 210. The dummy electrodes DE may
be disposed in the separation space SP between the first
sub-sensing electrode 311 and the second sub-sensing electrode 331.
The dummy electrodes DE may be spaced apart from each other with a
predetermined separation space, which is a separation space between
the first sub-sensing electrode 311 and the second sub-sensing
electrode 331 adjacent to each other, disposed therebetween. The
dummy electrodes DE may be disposed in the same layer as the first
sub-sensing electrode 311 and the second sub-sensing electrode
331.
The insulating layer ILD may be disposed on the dummy electrode DE.
The insulating layer ILD may come into direct contact with an upper
surface of the dummy electrode DE and may be further disposed sin
the separation space between the sub-sensing electrodes 311 and 331
that is adjacent to the dummy electrode DE, fill the separation
space, come into contact with a side surface of the dummy electrode
DE and the side surfaces of the sub-sensing electrodes 311 and 331,
and directly come into contact with an upper surface of the second
substrate 210 which is exposed in the corresponding area.
The third sub-sensing electrode 315 and the fourth sub-sensing
electrode 335 may be spaced apart from each other with the
separation space SP disposed therebetween. A width of the
separation space SP between the third sub-sensing electrode 315 and
the fourth sub-sensing electrode 335 may be the same as a width of
the separation space SP between the first sub-sensing electrode 311
and the second sub-sensing electrode 331. For example, inner side
surfaces of the third sub-sensing electrode 315 and the fourth
sub-sensing electrode 335 may be aligned in the thickness direction
with inner side surfaces of the first sub-sensing electrode 311 and
the second sub-sensing electrode 331 therebelow. The third
sub-sensing electrode 315 and the fourth sub-sensing electrode 335
might not overlap the dummy electrode DE in the thickness
direction.
The first adhering member AM1 may come into direct contact with the
fourth sub-sensing electrode 335 and the third sub-sensing
electrode 315. The first adhering member AM1 may come into direct
contact with the upper surface of the insulating layer ILD that is
exposed by the fourth sub-sensing electrode 335 and the third
sub-sensing electrode 315. In some exemplary embodiments of the
present disclosure, the polarizing film POL and the first adhering
member AM1 may be omitted. In this case, the second adhering member
AM2 disposed at the lower portion of the window WD may come into
direct contact with the fourth sub-sensing electrode 335 and the
third sub-sensing electrode 315. The second adhering member AM2 may
also be disposed in the separation space SP and come into direct
contact with the upper surface of the insulating layer ILD that is
exposed by the fourth sub-sensing electrode 335 and the third
sub-sensing electrode 315.
FIG. 16 is an enlarged view of area B of FIG. 8, FIG. 17 is a view
illustrating a first wiring portion of FIG. 16, FIG. 18 is a view
illustrating the first wiring portion and a second wiring portion
of FIG. 16, and FIG. 19 is a cross-sectional view taken along line
V-V' of FIG. 16. In FIG. 19, the adhering members AM1 and AM2, the
polarizing film POL, and the window WD are further illustrated.
Referring to FIGS. 3, 8, and 16 to 19, the width of the touch
signal lines TL1 and IL2 may be smaller than an average width of
the electrode portions 310 and 330. Because the resistance tends to
be inversely proportional to the width, decreasing the resistance
of the touch signal lines TL1 and TL2 themselves may be taken into
consideration to prevent the above-described RC delay. However,
because the touch signal lines TL1 and TL2 are disposed in the
non-sensing area NSA which is narrower than the sensing area SA,
increasing the width of the touch signal lines TL1 and TL2
themselves might not be easy. Thus, unlike the electrode portions
310 and 330 including a conductive material having light
transmittance, the touch signal lines TL1 and TL2 may include an
opaque conductive material of the second conductive layer ML2 whose
resistance is lower than the conductive material having light
transmittance.
For example, the second touch signal line TL2 may include the first
wiring portion LP1 disposed on the second substrate 210 and the
second wiring portion LP2 disposed on the first wiring portion LP1.
The first wiring portion LP1 may be disposed in the first
conductive layer ML1, and the second wiring portion LP2 may be
disposed in the second conductive layer ML2. For example, the first
conductive layer ML1 may further include the first wiring portion
LP1 and the second conductive layer ML2 may thither include the
second wiring portion LP2.
The first wiring portion LP1 may be disposed directly on the second
substrate 210, and the second wiring portion LP2 may be disposed
directly on the first wiring portion LP1 and electrically connected
to the first wiring portion LP1. For example, since the second
touch signal line TL2 includes the first wiring portion LP1 and the
second wiring portion LP2 coming into contact with each other, even
when the second wiring portion LP2 disposed on the first wiring
portion LP1 is disconnected, the second touch pad portion TPD2 and
the second electrode portion 330 may be electrically connected
through the first wiring portion LP1 electrically connected to the
second wiring portion LP2.
Because the width of the second wiring portion LP2 is smaller than
the width of the first wiring portion LP1, an upper surface of the
first wiring portion LP1 may be partially exposed. The insulating
layer ILD may be disposed directly on the second wiring portion LP2
and may at least partially cover the first wiring portion LP1 and
the second wiring portion LP2. For example, the insulating layer
ILD may cover side surfaces of the first wiring portion LP1 and the
second wiring portion LP2 and cover the exposed upper surface of
the first wiring portion LP1 and the upper surface of the second
wiring portion LP2. However, the width of the second wiring portion
LP2 is not necessarily limited thereto and may also he equal to the
width of the first wiring portion LP1 or larger than the width of
the first wiring portion LP1 such that the second wiring portion
LP2 covers the side surface of the first wiring portion LP1.
The second touch signal line TL2 may be provided as a plurality of
second touch signal lines TL2, and the plurality of second touch
signal lines TL2 may be spaced apart from each other. The first
wiring portion LP1 of one second touch signal line TL2 may be
spaced apart from the first wiring portion LP1 of another second
touch signal line TL2 adjacent to the one second touch signal line
TL2. Likewise, the second wiring portion LP2 of one second touch
signal line TL2 may be spaced apart from the second wiring portion
LP2 of another second touch signal line TL2 adjacent to the one
second touch signal line TL2. The insulating layer ILD may come
into direct contact with an upper surface of the second substrate
210 exposed by the second touch signal line TL2.
The cap pattern LP3 may be further disposed on the insulating layer
ILD. The cap pattern LP3 may be disposed in the third conductive
layer ML3. For example, the third conductive layer ML3 my further
include the cap pattern LP3.
The cap pattern LP3 may come into direct contact with the
insulating layer ILD. The cap pattern LP3 may have a width larger
than that of a single second touch signal line TL2 and may prevent
disconnection of the plurality of second touch signal lines TL2 by
covering and protecting the plurality of second touch signal lines
TL2.
The first adhering member AM1 may come into direct contact with the
cap pattern LP3. In some exemplary embodiments of the present
disclosure, the polarizing film POL and the first adhering member
AM1 may be omitted. In this case, the second adhering member AM2
disposed at the lower portion of the window WD may come into direct
contact with the cap pattern LP3.
The configurations of wiring portions, the relationship with the
cap pattern LP3, and the like of the first touch signal line TL1
may be substantially the same as those of the second touch signal
line TL2 except that configurations connected are different from
the second touch signal line TL2. Therefore, it is evident that the
description of the second touch signal line TL2 given above may be
applied as it is to the first touch signal line TL1 except for the
connection relationship between an electrode portion and a touch
pad portion in the second touch signal line TL2.
Hereinafter, an exemplary embodiment of the present disclosure will
be described, in the following embodiment, elements which are
identical to those of the above-described embodiment will be
denoted by like reference numerals, and to the extent that the
descriptions thereof is omitted or simplified, it may be assumed
that these elements are at least similar to corresponding elements
that are described elsewhere within the present disclosure.
FIG. 20 is a plan view of a portion of a touch sensor according to
an exemplary embodiment of the present disclosure, and FIG. 21 is a
cross-sectional view of FIG. 20.
Referring to FIGS. 20 and 21, the touch sensor, according to an
exemplary embodiment of the present disclosure, is different from
what is shown in FIGS. 10 and 15 in that a fourth sub-sensing
electrode 335_1 of a second electrode portion 330_1 overlaps a
dummy electrode DE.
For example, the fourth sub-sensing electrode 335_1 of the second
electrode portion 330_1 may at least partially overlap the dummy
electrode DE and, further, may also at least partially overlap a
separation space between the dummy electrode DE and a second
sub-sensing electrode 331. When a conductive layer is not disposed
at an upper portion of the separation space between the dummy
electrode DE and the second sub-sensing electrode 331, a
reflectance difference may occur in the thickness direction between
the separation space and a surrounding portion (where a conductive
layer is disposed) of the separation space, and a pattern may be
viewed from the outside. However, according to the present
embodiment, because the fourth sub-sensing electrode 335_1 of the
second electrode portion 330_1 at least partially overlaps the
dummy electrode DE and, further, also at least partially overlaps
the separation space between the dummy electrode DE and the second
sub-sensing electrode 331, viewing of the pattern may be
prevented.
In FIG. 21, an inner side surface of the fourth sub-sensing
electrode 335_1 is illustrated as being aligned in the thickness
direction to a side surface of the dummy electrode DE that opposes
a first sub-sensing electrode 311. However, the present disclosure
is not necessarily limited thereto, and the inner side surface of
the fourth sub-sensing electrode 335_1 may be disposed between the
side surface of the dummy electrode DE that opposes the first
sub-sensing electrode 311 and a side surface of the dummy electrode
DE that opposes the second sub-sensing electrode 331.
FIG. 22 is a plan view of a portion of a touch sensor according to
an exemplary embodiment of the present disclosure, and FIG. 23 is a
cross-sectional view of FIG. 22.
Referring to FIGS. 22 and 23, the touch sensor, according to the
present embodiment, is different from what is shown in FIGS. 10 and
15 in that a third sub-sensing electrode 315_1 of a first electrode
portion 310_1 overlap a dummy electrode DE.
For example, the third sub-sensing electrode 315_1 of the first
electrode portion 310_1 may at least partially overlap the dummy
electrode DE and, further, may also at least partially overlap a
separation space between the dummy electrode DE and a first
sub-sensing electrode 311. In this way, viewing of a pattern due to
a separation space between the dummy electrode DE and a first
sub-sensing electrode 311 may be prevented.
In FIG. 23, an inner side surface of the third sub-sensing
electrode 315_1 is illustrated as being aligned in the thickness
direction to a side surface of the dummy electrode DE that opposes
a second sub-sensing electrode 331. However, the present disclosure
is not necessarily limited thereto, and the inner side surface of
the third sub-sensing electrode 315_1 may be disposed between the
side surface of the dummy electrode DE that opposes the second
sub-sensing electrode 331 and a side surface of the dummy electrode
DE that opposes the first sub-sensing electrode 311.
FIG. 24 is a plan view illustrating a portion of a touch sensor
according to an exemplary embodiment of the present disclosure, and
FIG. 25 is a cross-sectional view of FIG. 24.
Referring to FIGS. 24 and 25, the touch sensor according to the
present embodiment is different from what is shown in FIGS. 20 and
21 in that not only a fourth sub-sensing electrode 335_1 of a
second electrode portion 330_1 but also a third sub-sensing
electrode 315_1 of a first electrode portion 310_1 at least
partially overlaps a dummy electrode DE.
For example, according to the present embodiment, the fourth
sub-sensing: electrode 335_1 of the second electrode portion 330_1
and the third sub-sensing electrode 315_1 of the first electrode
portion 310_1 may each at least partially overlap the dummy
electrode DE. The fourth sub-sensing electrode 335_1 and the third
sub-sensing electrode 315_1 may be spaced apart from each other
with a predetermined separation space disposed therebetween a width
of the dummy electrode DE may be larger than a width of the
separation space, and, in the plan view, the dummy electrode DE may
completely cover the separation space.
FIG. 26 is a plan view of a portion of a touch sensor according to
an exemplary embodiment of the present disclosure, and FIG. 27 is a
cross-sectional view of FIG. 26.
Referring to FIGS. 26 and 27, the touch sensor, according to an
exemplary embodiment of the present disclosure is different from
what is shown in FIGS. 10 and 15 in that a third sub-sensing
electrode 315 and a fourth sub-sensing electrode 335 are spaced
apart from each other with a separation space SP_1, whose width is
larger than that of the separation space SP described above,
disposed therebetween and in that dummy electrodes DE_1, which are
disposed in the same layer as the sub-sensing electrodes 315 and
335, are further disposed in the separation space SP_1.
For example, the third sub-sensing electrode 315 and the fourth
sub-sensing electrode 335 may be spaced apart from each other with
the separation space SP_1, whose width is larger than that of the
separation space SP described above, disposed therebetween, and the
dummy electrodes DE_1, which are disposed in the same layer as the
sub-sensing electrodes 315 and 335, may be further disposed in the
separation space SP_1. The dummy electrodes DE_1 may be disposed,
in the third conductive layer ML3 of FIG. 3. For example, the third
conductive layer ML3 may further include the dummy electrodes
DE_1.
The sub-sensing electrodes 315 and 335 may include inner side
surfaces which are more indented in a direction moving away from
the dummy electrodes DE_1 than inner side surfaces of sub-sensing
electrodes 311 and 331 corresponding thereto. In the plan view, the
dummy electrodes DE_1 may overlap the separation space SP between
the first sub-sensing electrode 311 and the second sub-sensing
electrode 331, and, because the width of the dummy electrode DE_1
is larger than the width of the separation space SP, the dummy
electrode DE_1 may completely cover the separation space SP.
Further, the dummy electrodes DE_1 may partially overlap the
sub-sensing electrodes 311 and 331 therebelow. For example, the
inner side surfaces of the sub-sensing electrodes 311 and 331 may
be disposed between both side surfaces (at inner sides of the both
side surfaces) of the dummy electrodes DE_1. The separation space
between the sub-sensing electrodes 315 and 335 adjacent to the
dummy electrodes DE_1 may overlap the sub-sensing electrodes 311
and 331 therebelow, and the sub-sensing electrodes 311 and 331 may
completely cover the separation space between the sub-sensing
electrodes 315 and 335 adjacent to the dummy electrodes DE_1.
According to the present embodiment, in the plan view, the dummy
electrodes DE_1 may at least partially overlap the separation space
SP between the first sub-sensing electrode 311 and the second
sub-sensing electrode 331, and, because the width of the dummy
electrode DE_1 is larger than the width of the separation space SP,
the dummy electrode DE_1 may completely cover the separation space
SP so that, by the dummy electrodes DE_1 covering the separation
space between the sub-sensing electrodes 311 and 331 and the dummy
electrodes DE, viewing of a pattern is prevented. Further, viewing
of the pattern may be prevented by covering the separation space
between the dummy electrodes DE_1 and the sub-sensing electrodes
315 and 335 by the sub-sensing electrodes 311 and 331
therebelow.
In some exemplary embodiments of the present disclosure, the
arrangement relationship between the first conductive layer ML1 and
the second conductive layer ML3 of FIGS. 26 and 27 may be reversed
upside down. For example, the third sub-sensing electrode 315 and
the fourth sub-sensing electrode 335 may be spaced apart with a
separation space SP_1, whose width is smaller than that of the
separation space SP, disposed therebetween, and dummy electrodes
DE_1 disposed in the same layer as the sub-sensing electrodes 315
and 335 may be thither disposed in the separation space SP_1. The
sub-sensing electrodes 315 and 335 may include inner side surfaces
which are disposed to protrude further in a direction approaching
the dummy electrodes DE_1 than the inner side surfaces of the
sub-sensing electrodes 311 and 331 corresponding thereto. In the
plan view, the dummy electrodes DE may at least partially overlap
the separation space SP_1 between the third sub-sensing electrode
315 and the fourth sub-sensing electrode 335, and, because the
width of the dummy electrode DE is larger than the width of the
separation space SP_1, the dummy electrode DE may completely cover
the separation space SP_1. Further, the dummy electrodes DE may
partially overlap the sub-sensing electrodes 315 and 335
thereabove. For example, the inner side surfaces of the sub-sensing
electrodes 315 and 335 may be disposed between more inward than
both side surfaces of the dummy electrodes DE. The separation space
between the sub-sensing electrodes 311 and 331 adjacent to the
dummy electrodes DE may at least partially overlap the sub-sensing
electrodes 315 and 335 thereabove, and the sub-sensing electrodes
315 and 335 may completely cover the separation space between the
sub-sensing electrodes 311 and 331 adjacent to the dummy electrodes
DE.
FIG. 28 is a plan view of a portion of a touch sensor according to
an exemplary embodiment of the present disclosure, FIG. 29 is a
cross-sectional view taken along line VI-VI' of FIG. 28, and FIG.
30 is a cross-sectional view taken along line VII-VII' of FIG.
28.
Referring to FIGS. 28 to 30, in the touch sensor according to the
present embodiment, a first electrode portion 310_2 has the same
arrangement and shape as the second electrode portion 330 of FIG.
10, except that the first electrode portion 310_2 extends primarily
in the first direction DR1, and a second electrode portion 330_2
has the same arrangement and shape as the first electrode portion
310 of FIG. 10, except that the second electrode portion 330_2
extends primarily in the second direction DR2.
For example, each second electrode portion 330_2 may include a
plurality of second sub-sensing electrodes 331_1 spaced apart from
each other in the first direction DR1, a sensing connecting portion
333 which physically connects the second sub-sensing electrodes
331_1 adjacent to each other, and a fourth sub-sensing electrode
335_2 disposed on the second sub-sensing electrodes 331_1 and
electrically connected to the second sub-sensing electrodes 331_1
through the second contact hole CNT2 of the insulating layer ILD.
The second sub-sensing electrodes 331_1 of the second electrode
portion 330_2 and the sensing connecting portion 333 which connects
the second sub-sensing electrodes 331_1 adjacent to each other may
have a linear shape extending primarily in the first direction
DR1.
The first electrode portion 310_2 may extend primarily in the
second direction DR2. The first electrode portion 310_2 may be
provided as a plurality of first electrode portions 310_2, and the
plurality of first electrode portions 310_2 may be spaced apart
from each other in the first direction DR1. The first electrode
portion 310_2 may be electrically insulated from the second
electrode portion 330_2. Each first electrode portion 310_2 may
include a plurality of first sub-sensing electrodes 311_1 spaced
apart from each other in the second direction DR2, and a third
sub-sensing electrode 315_2 electrically connected to the first
sub-sensing electrodes 311_1 through the first contact hole CNT1 of
the insulating layer ILD. The first sub-sensing electrode 311_1 may
be spaced apart from the second sub-sensing electrode 331_1
adjacent thereto with a predetermined separation space SP disposed
therebetween and may be electrically insulated from the second
sub-sensing electrode 331_1. Meanwhile, although the plurality of
second sub-sensing electrodes 331_1 spaced apart from each other in
the first direction DR1 form a linear shape by being electrically
connected by the sensing connecting portion 333 disposed in the
same layer (the first conductive layer ML1), because the plurality
of first sub-sensing electrodes 311_1, which are disposed in the
same layer as the second sub-sensing electrodes 331_1 and spaced
apart from each other in the second direction DR2, are insulated
front the second electrode portion 330_2 as described above, the
first sub-sensing electrodes 311_1 adjacent to each other may be
electrically connected through the third sub-sensing electrode
315_2 disposed in a layer (the third conductive layer ML3) that is
different from the first conductive layer ML_1. The third
sub-sensing electrode 315_2 may be spaced apart from the fourth
sub-sensing electrode 335_2 adjacent thereto with a predetermined
separation space SP disposed therebetween and may be electrically
insulated from the fourth sub sensing electrode 335_2.
FIG. 31 is a modified example of an embodiment of FIG. 19.
Referring to FIG. 31, a touch sensor, according to the present
embodiment, is different from what is shown in FIG. 19 in that the
cap pattern LP3 which covers the plurality of second touch signal
lines TL2 is omitted.
Since all the other details are the same as those described above
with reference to FIGS. 16 to 19, overlapping descriptions will be
omitted and it may be assumed that these elements for which a
description has been omitted are at least similar to corresponding
elements that are described elsewhere within the present
disclosure.
FIG. 32 is a plan view of a portion of a touch sensor according to
an exemplary embodiment of the present disclosure, and FIG. 33 is a
cross-sectional view of FIG. 32.
Referring to FIGS. 32 and 33, the touch sensor, according to the
present embodiment, is different from what is shown in FIGS. 26 and
27 in that dummy electrodes DE_1 may be formed as a plurality of
patterns.
For example, in the touch sensor, according to the present
embodiment, the dummy electrodes DE_1 may include a first pattern
which covers a separation space between dummy electrodes DE and
first sub-sensing electrodes 311 and a second pattern which covers
a separation space between the dummy electrodes DE and second
sub-sensing electrodes 331.
The first pattern and the second pattern may be spaced apart from
each other with a predetermined separation space disposed
therebetween, the separation space between the first pattern and
the second pattern may at least partially overlap the dummy
electrodes DE in the thickness direction, and the dummy electrodes
DE may completely cover the separation space between the first
pattern and the second pattern.
According to a touch sensor and a display device according to an
exemplary embodiment of the present disclosure, the resistance of
electrode portions of the touch sensor can be lowered.
Although exemplary embodiments of the present disclosure of the
invention have been disclosed for illustrative purposes, those
skilled in the art will appreciate that various modifications,
additions and substitutions are possible, without departing from
the scope and spirit of the present disclosure.
* * * * *